Before the operation of the pipeline ceased in October 2021, it used to supply mainly Spain and Portugal, as well as Morocco with natural gas.

Following the breakdown of diplomatic relations between Algeria and Morocco in August 2021, Algeria decided not to renew the 25-year MGE operation contract, which expired at midnight on 31 October 2021, opting instead to supply Spain through the Medgaz pipeline.

The Algerian section of pipeline, 515 kilometres (320 mi) long, runs from the Hassi R'mel field in Algeria to the Moroccan border.

The 522 kilometres (324 mi) long Moroccan section is owned by the Moroccan State and operated by Metragaz, a joint venture of Sagane (a subsidiary of Spanish Gas Natural), Transgas (Portugal), and SNPP (Morocco).

The length of the offshore section crossing the Strait of Gibraltar is 45 kilometres (28 mi); it is owned jointly by Enagás (Spain), Transgas, and the Moroccan state.